Vibrator mounting



Nov. 22, 1955 c. D. HUFF 2,724,582

- VIBRATOR MOUNTING Filed Feb. 24, 1953 FIG. I. 2

INVENTOR CARLOS D. HUFF BY %m 1/ 404 ATTO RN E Y'S VIBRATOR MOUNTINGCarlosDr Hulr, Valley Center, Califi, assignor to American Pipe andConstruction Co., a corporation of Delaware Application February 24,1953, Serial No. 338,531

7 Claims. (Cl. 259- 72) ing cylinder, such as a pipe mold used formaking concrete pipe by the centrifugal method. It is a particularobject to provide new and improved means for mounting and utilizing aroller member on the vibrator and providing means for yieldably forcingthe roller into contact with the periphery of the rotating pipe mold.

Another object is to provide such a construction which serves to highlyefliciently transmit the generated vibrations of the vibrator to thepipe mold.

A further object is to provide a simple construction which can bereadily fabricated and which is easy to install and operate. Theseandother objects will be apparent from the drawing and the followingdescription.

Referring to the drawing:

Fig. 1 is a side elevational view of a pipe mold shown mounted onsupporting rollers and showing my invention associated therewith;

Fig. 2 is a fragmentary sectional view on a larger scale on line 2-2 ofFig. 1;

Fig. 3 is a section on line 33 of Fig. 2; and

Fig. 4 is a sectional view through a vibrator showing another type ofroller mounting.

More particularly describing the invention, numeral 11 indicates acylindrical pipe mold which is shown mount ed on supporting rollers 12,one or more of which are customarily driven to impart high velocityrotation to the mold in order to compact concrete 13 introducedthereinto.

In the centrifugal molding process it is highly desirable to be able tovibrate the pipe mold ata high frequency but low amplitude. By the meanswhich I shall disclose, I am able to transmit the vibrations set up bythe vibrator directly to the rotating mold with a high degree ofefficiency. I provide a standard vibrator 15 which may be operated bycompressed air supplied through a hose 16. The vibrator has an air motor17 which operates a shaft 18 driving or rotating an cecentric weight 19.I mount the vibrator on a base 20 in the form of an inverted channel.The base is pivotally mounted upon a supporting frame 21 on a foundation 22. For this purpose the base is provided with a pair of rigidlymounted, dependent, laterally spaced arms 23 and 24 which are splined toa shaft 25 pivotally mounted in frame 21. Arm 23 is made long enough toextend below the shaft, the lower end being pivotally connected topiston rod 26 of fluid ram 27.

The vibrator is clamped to base 20 by a saddlelike channel element 29welded to the base and by a removable similar saddle-like element30,.the parts 29 and 30 being secured by bolts 31.

For the purpose of transmitting the vibrations gen? erated. by vibrator15 to the mold 11, I mount a roller 40 on the vibrator for rollingcontact with a peripheral band or track 41 on the surface of the mold.This roller is mounted on a pin 42, the roller having a suitable bushing43. The pin has its ends mounted in the lugs 44a of a band 44 whichencircles the body of the vibrator. A shrink fit of the band on thevibrator is preferred. The lugs are welded to the band. The band 44which supports roller 40 is preferably mounted on the portion of thevibrator immediately surrounding the region of the eccentric weight 19of the vibrator so as to take advantage of maximum vibration.

In the operation of the device, the ram 27 is used for tilting theplatform 20 in a direction toward the mold 11 so as to firmly press theroller 40 into engagement with track 41 on the mold. It will be apparentthat the ram 27 may be appropriately operated to retract the vibratorassembly from the mold at any time.

In Fig. 4 I show a modified form of construction wherein .a band 50having lugs or end portions 51 is secured tightly to the vibrator by oneor more bolts 52, a spacer sleeve 53 preventing overtightening of thebolt. The same roller 40 is mounted on pin 41.

Although I have illustrated and described a preferred form of myinvention, 1 contemplate that various changes and modifications can bemade without departing from the invention, the scope of which isindicated by the following claims.

I claim:

1. In means for imparting vibratory movement to a rotating objectresting on support rollers and having a substantially cylindricalperipheral surface, a vibrator, means supporting said vibrator adjacentthe peripheral surface of said object, and a vibrator roller mounted onsaid vibrator between the vibrator and said object in rolling contactwith said peripheral surface of the object.

.2. In means for imparting vibratory movement to a rotating objectresting on support rollers and having a substantially cylindricalperipheral surface, a vibrator, means supporting said vibrator formovement toward and away from said object, a vibrator roller mounted onsaid vibrator between the vibrator and said. object for rolling contactwith said peripheral surface of the object, and means for yieldablyforcing said vibrator and vibrator roller as a unit toward said rotatingobject.

3. In means for imparting vibratory movement to a rotating object havinga substantially cylindrical peripheral surface, a vibrator, meanssupporting said vibrator formovement toward and away from said object, aband tightly encircling said vibrator, a pair of spaced mounting lugsintegral with said band, and a roller mounted between said lugs andprojecting therebeyond for engagement with said peripheral surface ofthe object.

4. A construction as set forth in claim 3 in which said band is shrunkonto said vibrator and in which said lugs are welded to said band.

5. A construction as set forth in claim 3 in which said band is boltedabout said vibrator and in which said lugs are end portions of saidband.

6. In means for imparting vibratory movement to a rotating cylindricalform for casting concrete, a sta tionary frame, a vibrator base memberpivotally mounted on said frame, a vibrator secured to said base memberlaterally of the pivotal axis of the base member, a roller mounted onsaid vibrator for engagement with the periphery of said form, the axisof rotation of said roller being parallel to the axis of rotation of theform, and a fluid ram between said stationary frame and said-"g,724,5s2., vib'rz'a'tor s member for urging said roller into pressureand roller as a unit into pressure engagement with said'engagemenrwithsaid 01111. fuuu.

7. In apparatus for the rnanufacture of concrete pipe References Citedinfthe file of this Patent 0r hali qra l dr t aly pe q ml m an t r s ppotin and rotatingsa'id form,". a vibrator, a r oll'er mounted 5 UNITEDSTATES PATENTS on sa id v ibrator engaging theperipherY of said fo'rm',1,753,412 Harris Apr. 8, 1930 thegxis of rotation of said rollerbeingparallel to that 2,185,850 Jackson 'i Jan. 2, 1940 .olfsaidj form,means supporting said vibrator and roller 2,518,636 Phillips Aug. 15,1950 forwmoye rnent as a un it toward andaway from said 2,552,163Fleischrnann May 8, 1951 fqr zfan'd mcans fgr yiel dahly forcing saidvibrator 10 2,610,040 'Emmbns il I Sept'l9; 1952

